#!/bin/bash
a=`echo $?`
echo $a
b=`ps  -aux`
#echo "$b"

#login_user=`who | awk  '{print $1}'| uniq -c`
login_user=`who | wc  -l` 
echo  -e "统计登陆用户数量" $login_user

count=`who | wc -l`
printf  "现在有%d用户登录\n" $count